Why might a 1998 Escort not start after replacing the alternator and battery?

Find out if you need fire or fuel then go from there. First thing you do. if car wont start. check the wires make sure they are attch good. if bettery is new and the Alternator is new. might possbile wire not attach good check that. or check the Fuse under the dash. have to check all and until you found it. good luck.